vol. 27, No. 1, 2016, p. 1-226

As we always do at the beginning of every year, we would like to share with you our perspectives for the newyear ahead. Overall, our impression is that this analysis contains mixed feelings. On one hand, the JBCS most important figures remain safely constant: our manuscript processing time remains as low as ever, around 3 months, on average, between submission and on-line publication; the number of submissions has slightly increased since last year and we are close to a healthy submission level of one thousand manuscripts per year, majority of which from authors residing outside Brazil; our rejection rate remains around 65%, and only our impact factor has not raised yet, as much as we would like.

Fungal mycelium is a fundamental component of complex ecological networks with several symbiotic and dissipative properties on terrestrial biogeochemical matrix. The vast presence of mycelium is responsible for the control of chemical potential (e.g. pE and pH) of aqueous phase on soils, contributing to its response (buffering) capacity and the time controlling of physical-chemical conditions, as shown for the model of complex system S. Details are presented in the Article Equilibrium and Out-Of-Equilibrium Investigation of Proton Exchange and CuII and ZnII Complexation on Fungal Mycelium (Trametes hirsuta) by Vicente R. Almeida, Bruno Szpoganicz, Lei Chou, KittyBaert, Annick Hubin and Steeve Bonneville on page 15.

Three new RuII complexes with pyrimidine-2-thiolate, bipy and varying the diphosphinic ligands were obtained. These compounds are promising agents against Mycobacterium tuberculosis and breast cancer cells, MDA-MB-231.

How to cite this articleSalles MO, Araujo WR, Paixão TRLC. Development of a Molecularly Imprinted Modified Electrode to Evaluate Phenacetin Based on the Preconcentration of Acetaminophen. J. Braz. Chem. Soc. 2016;27(1):54-61

A phenacetin-selective molecularly imprinted polymer (MIP) was synthesised and showed a high recognition ability for procaine and aminopyrine. In addition, the MIP also presented the ability to preconcentrate phenacetin and also some intermediates, such as acetaminophen.

Chia is a grain with high nutritional potential, mainly omega-3 contents, and this ingredient can be used in the development of several food products, such as bakery ones, especially cakes. Chemometrics presents interesting tools to assess the quality of the final product, and desirability function is a very useful method to determine the best formulation for all kinds of food stuffs.

Bio-oil contains promising compounds, such as phenolic compounds, active in the control of microbiological contamination during fuel storage. The figure shows that through two-dimensional gas chromatography with time-of-flight mass spectrometry (GC×GC/TOF MS) we identified these phenolic compounds.

Chemical structure of a new alkaline solution called Universol®, developed by our research group. Universol® degrades most, if not all, organic and non-organic material. We used this alkaline solution to solubilize human serum and hair samples to determine Fe and Zn levels by graphite furnace atomic absorption spectrometry (GF AAS).

How to cite this articleJorge FE, Ferreira IB, Soprani DD, Gomes T. Estimating the Impact of an All-Electron Basis Set and Scalar Relativistic Effects on the Structure, Stability, and Reactivity of Small Copper Clusters. J. Braz. Chem. Soc. 2016;27(1):127-135

How to cite this articleLima MJA, Vieira GP, Fernandes RN, Tanaka AA, Reis BF. Development of a Procedure Based on Chemiluminescence and Multicommutation Approach for the Determination of Folic Acid in Pharmaceuticals. J. Braz. Chem. Soc. 2016;27(1):153-160

Diagram of the setup for folic acid determination in pharmaceuticals by chemiluminescence.

A novel series of derivatives was synthesized from limonin using methodology in solution as well as in heterogeneous medium. The present study generated compounds that showed important antimicrobial activity.

The photophysical investigations showed that in the presence of bovine serum albumin (BSA), the metal-to-ligand-charge transfer (3MLCT) emission of the rhenium(I) complexes was quenched due to entrapment of the complex within the protein environment.

The synthesis and structure of new diazenecarboxamide ligands are described, as well as the subsequent reactions to give rise to new adducts in which B(C6F5)3 is coordinated to the carbonyl group. All new ligands and adducts are fully characterized by nuclear magnetic resonance (NMR), infrared (IR), elemental analysis and single-crystal X-ray diffraction methods.

CuCl2 loaded with activated carbon had synthesized and then utilized as a catalyst for the oxidation of cyclohexane with molecular oxygen as the oxidant and the tert-butylhydroperoxide as the co-oxidant under various conditions.

The supported liquid membrane (SLM) design for CrVI extraction shows the transport mechanism of Cr ions in the form of [CrO(O2)2.TOPO] (TOPO = trioctylphosphine oxide) complex from feed to strip phase through membrane phase.